WO1998030012A1

WO1998030012A1 - Method and switching device for billing in telecommunications networks

Info

Publication number: WO1998030012A1
Application number: PCT/DE1997/002870
Authority: WO
Inventors: Franz SCHÖNBORN
Original assignee: Deutsche Telekom Ag
Priority date: 1996-12-27
Filing date: 1997-12-10
Publication date: 1998-07-09
Also published as: EP0948861B1; JP2001511959A; DE19654482A1; CA2276142C; ATE304269T1; US6532281B1; DE59712417D1; EP0948861A1; CA2276142A1; DE19654482B4

Abstract

Disclosed is an optimized-management telecommunications billing method or system, performing an optimized-management automatic telecommunication billing assisted by a bulk-rating computer (1) connected to an allocated switching center (3) for customer end terminals (7). Said optimized-management automatic telecommunications billing method is suitable for digitized and analog telecommunications networks using wired, radio or laser supported telecommunications technology via terrestrial or satellite link. Each terminal (7) is connected to a telecommunications counter (8), which is leaded or protected by any other means against manipulation and which can be read by a customer remotely or on request with a dual card. The bulk-rating computer (1) carries out a three-fold processing of information quantities consumed. Said computer initially compares actual values with set process ranges and generates a process alarm when said alarm limits are surpassed. It then checks actual usage values to detect possible trends and generates an alarm when a tendency to surpassing said limits is detected. The computer then stores information on charges, process behavior and the alarms for documentation purposes in a system memory (14). At a given moment or for specific requirements, the computer calculates a new bulk rate value, which is brought into line with the modified communications behavior of the customer or group of customers concerned. The bulk-rating computer (1) is controlled by an operator terminal (1) having a protocol printer (11).

Description

DESCRIPTION

METHOD AND CIRCUIT ARRANGEMENT FOR CLASSIFICATION IN COMMUNICATION NETWORKS

The invention relates to a method for communication tariffing in communication networks according to the preamble of claim 1 and a system or a circuit arrangement according to the preamble of claim 6.

In the known analog communication networks, methods for communication tariffing are already known. These methods offer the possibility of traffic control in the network via the price. For example, so-called "moonlight tariffs" were used in the 1980s, which work with a rigid tariff structure divided into a few tariff groups. Although the possibility of traffic control via the price was basically realized through this method, only a very rough traffic control is possible because the division into certain time-dependent price groups does not take into account the actual line load. In recent times, methods have become known which enable the telephone behavior of individuals or groups of people to be measured in a relatively inexpensive manner. For example, customer profiles on telephone behavior can be created. Using so-called call behavior analysis methods, these profiles can be measured or created by evaluating measurement results. In "telekom / praxis", volume 9/96, volume 73, a so-called call behavior analysis (CBA) system from Hewlett-Packard is described by John Taylor on pages 39 and 40 under the title "Call Behavior Analysis". The invention is therefore based on the object of creating a method and a system or a circuit arrangement for administration-optimized communication tariffing in analog and digitized communication networks, the information about the

Communication behavior is taken into account or taken into account and enables individual user-related average connection times per time unit or transferred data quantities per time unit and the calculation of a lump sum for individual customers or for customer groups, which is the basis for billing over a longer period of time.

The solution according to the invention for the method is characterized in the characterizing part of patent claim 1 and the solution according to the invention for the system or the circuit arrangement is characterized in the characterizing part of patent claim 6.

Further solutions to the problem and embodiments of the invention are described in the characterizing parts of claims 2 to 5 for the method and 7 to 10 for the circuit arrangement.

According to the method, the actual communication data charges are continuously recorded. In addition, all call data is generally documented and saved or archived for a specific time. The basis for the procedure for administration-optimized communication tariffing is the average individual fee volume per time unit of each individual telecommunications customer. This average fee is set as an individual lump sum and, for example, a software-based comparison is carried out annually with the fees actually incurred and account balancing is carried out automatically. For example, the lump sum is automatically checked for correctness annually and possibly adjusted to the current conditions by the system. With the method and the system described here, considerable savings in material and administrative expenditure can be achieved while at the same time improving the service for the customer by means of simple and understandable accounting. Based on the available long-term or easily obtainable information about the communication behavior of both individual customers and customer groups, individual user-related average connection times per unit of time can be derived. In digital networks, as an alternative to determining the connection duration, it is generally possible to measure the amount of data transferred per unit of time (for example in megabytes per day or the like). This provides an exact volume-related size for measuring the network usage by the customer. The individual volume values are available directly at the output of the respective A / D converter for individual devices. The measurement of the telephone behavior of individuals and also of groups of people makes it possible to create customer profiles for the telephone behavior and these profiles can be recorded by means of so-called telephone behavior analysis methods or by evaluating measurement results, as for example in booklet 9/96 , Volume 73 of "telekom / praxis" on pages 39 and 40 by John Taylor. From these individual communication profiles, average individual cost profiles are automatically determined with the help of a computer, which in turn are converted into flat-rate invoice amounts on a bi-monthly, monthly or quarterly basis with regular fine-tuning to the precisely accrued fees. The individual user data are stored in the system and used as the basis for fine-tuning and for setting the long-term flat-rate remuneration mean values. These flat-rate averages are to be billed to users of communication services, for example for a period of one year, as a bimonthly invoice amount, for example. Since the difference amounts from the fine adjustment can be credits or credits, they can be offset directly against future usage fees or credits. For new customers, the fine adjustment is carried out for verification of the initial flat rate for a certain settling period. If the resulting difference remains within a target sector of x percent of the exact value of the usage fee, the flat rate is classified as appropriate and is set for the long term, for example for a year. This flat-rate settlement shows that there are no more bills to be sent, which leads to enormous savings for service providers, such as for Deutsche Telekom AG with more than 40 million bills per month for telecommunications services. The only exact invoice is the calculation of the difference between the actual and the target used for fine adjustment at the end of a flat rate period in the form of an annual statement.

Further advantages, features and possible uses of the present invention result from the following description in connection with the exemplary embodiments shown in the drawing.

The invention is described below with reference to embodiments shown in the drawing.

In the description, in the claims, in the abstract and in the drawing, the in the The list of reference symbols used below and the associated reference symbols used.

In the drawing:

Figure 1 is a diagram showing the relationship between usage fee, usage fee and exact consumption values.

Fig. 2 is a diagram showing the exceeding of the

Represents the flat rate corridor through the actual monthly usage fees;

3 shows a diagram which shows the exceeding of the flat-rate price corridor by the account balance offset against the respective value of the previous month;

4 shows a vector diagram to show the relationships between the monthly lump sum payment, the actual usage fee and the actual monthly consumption;

Fig. 5 is a diagram showing the process width;

6 shows a diagram to show the trend deviations;

Fig. 7 is a block diagram and

Fig. 8 is a block diagram of a

Flat rate calculator with operator terminal and printer. With the procedure described below, considerable savings in material and administrative expenses can be achieved while at the same time improving the service for the customer by means of simple and understandable accounting for the actual consumption of the respective customer.

The operating principle of the automated administration-optimized communication tariffing VKT is described below.

1. Based on existing long-term or easily obtainable information about the communication behavior of both individual customers and customer groups, individual user-related, average connection times per unit of time (connection duration, day, week, month, year) can be derived.

2. As an alternative to determining the connection duration, digitized networks offer the measurement of the amount of data transmitted per unit of time, for example in megabytes per day or the like. This provides an exact volume-related size for measuring the network usage by the customer. The individual volume values are available directly at the output of a respective A / D converter for end / individual devices.

3. The telephone behavior of individuals or groups of people is measured in order to create customer profiles on the telephone behavior. This is carried out, for example, by measurement using so-called telephone behavior analysis methods, both the detection and the evaluation. 4. The individuality extends both to user groups, which in turn can be divided into sub-groups, and to private individuals, who are divided into, for example, low-speaker, normal consumer and frequent speaker.

5. From these individual communication profiles, average individual cost profiles can be determined, which can be converted into flat-rate invoice amounts on a quarterly, bi-monthly or monthly basis with regular fine-tuning to the exact charges incurred.

6. The individual usage data are stored and processed within the system. They are used as the basis for the regular fine-tuning and for setting the long-term flat-rate remuneration mean values in a flat-rate calculator 1. These flat-rate averages are to be billed to users of communication services as a bimonthly invoice amount, for example.

7. The fine adjustment is carried out, for example, at the end of each customer's contract year. After one year of membership, there is the possibility of adjusting the lump sums to the current individual average cost profiles of the participants.

8. Difference amounts from the fine adjustment are either credits or credits. With the consent of the invoice recipient, the credit can be offset directly against future usage fees and loans are immediately settled. 9. New customers are assigned to a corresponding user class on the basis of the customer data to be requested from the customers and are thus initially flat-rate.

10. For new customers, the fine adjustment is carried out to verify the initial flat rate for a certain settling period, for example every two months. If the resulting difference remains within a target corridor of x percent of the exact value of the usage fee, the lump sum can be classified as correct and can be fixed in the long term, for example for a year. The relationships between the flat-rate usage fee and the exact consumption values are shown in the diagram according to FIG. 1.

11. With flat-rate billing, there is no longer any need to send invoices at all. The only exact invoice is the calculation of the difference between actual and target, i.e. between lump sums and exact usage fees, used for fine adjustment at the end of the flat rate period, for example one year, in the form of an annual bill.

FIG. 2 shows a diagram which illustrates the fact that, when a trend is formed, the deviations generally add up very quickly to amounts which exceed an alarm limit. As shown in FIG. 2 and can be recognized from the mean value curve, a return to the flat rate corridor can also take place after an alarm limit has been exceeded. In this case, intervention by the system to set a new flat rate would be premature. This can be largely mitigated by, for example, at least two successive overshoots from the upper one Alarm limit PAGrO or the lower alarm limit PAGrU must occur in order to initiate the resetting of the flat rate in the flat rate calculator 1 according to FIG. 8. It is shown, for example, that in the vacation months there is usually a shortfall and at certain times the corridor is exceeded. In addition, it can be clearly seen from FIG. 2 that a process alarm, shown at a, can occur at certain times. The arrow marked b shows the flat rate for use and the arrow shown c shows the average monthly consumption.

FIG. 3 shows a further diagram which shows that the flat-rate price range has been exceeded by the account balance offset against the respective value of the previous month. The arrow marked a again shows the point for the process alarm, the arrow marked d the difference to the lump sum. The respective account balance is equal to usage fee minus flat rate. The flexibility can be increased even further by evaluating various non-continuous violations of the flat-rate alarm limit. This can be achieved, for example, by relating the amount of exceedance and the time of the exceedance to one another. In any case, it makes sense to offset the exceedances of the upper and lower limits PAGrO and PAGrU within a valuation period or to stabilize the flat rate in the long term. This is important, for example, to be able to go through the vacation time and the months of special communication activities without triggering an alarm.

4 shows the relationship between the monthly lump sum payment, the actual usage fee and the actual monthly consumption. The arrow 1 shows the monthly lump sum payment; arrow 2 the monthly difference between the actual usage fee and the monthly lump sum payment and the arrow 3 the actual monthly usage in Shannon hours, which corresponds to the actually arising usage fees.

It must be emphasized again that all actual communication charges are recorded continuously according to the method according to the invention. In addition, however, all call data must also be documented and saved for a certain time. The automated administration-optimized communication tariffing VKT described here is based on the average individual fee volume per time unit of each individual telecommunications customer. This average fee is set as an individual lump sum. Every year, a comparison is made with the actual fees and an account settlement. The lump sum is checked annually for correctness and possibly adapted to the current conditions. Of course, other periods can also be introduced. A communication consumption unit is defined here, according to which the amount of data transmitted can be measured and classified as a measure of "used information" in the form of communication units. The unit megabyte-hour measured in Shannon (SHh) is proposed as the consumption standard.

The fluctuations in the monthly communication consumption, adjusted for the highest and the lowest value, form over the course of the period used in each case the process range in which the actual fee volume may move. To determine the process width, a monthly mean value curve is calculated from the measured daily values, as shown in the diagram in FIG. 5. Out From these monthly averages, the idealized average is determined as a lump sum for one year at a time. The arrow a in the diagram according to FIG. 5 again points to the process alarm point, the arrow b to the flat-rate usage charge shown in dashed lines, the arrow c to the curve of the average monthly consumption and the arrow d to the curve of the average quarterly consumption. Each measuring point (°) gives a quarterly mean value, formed from the measuring points of the monthly mean values (D). The quarterly average is the assessment criterion for determining the amount of the individual lump sums. The fluctuation range of the monthly mean value curve forms the upper and lower process limits BGRO and BGRU, that is to say the largest deviations from the flat rate in the direction of higher or lower information consumption. The process alarm limit values a form a percentage surcharge to be derived from the individual communication profile for these process limit values. If these limit values are exceeded, a system alarm is triggered which indicates that at this point the lump sum amount can no longer be reconciled with the annual consumption. The process limit values PGRO and PGRU indicate the range that is covered by the generalization algorithm. By choosing the parameters in this algorithm there is the possibility of flexibility. PAGrO and PAGrU are the process alarm limit values, the exceeding of which causes an alarm message in process controlling. Deviations of this amount are not only to be compensated for within the otherwise normal course of the process within the year - until the next flat-rate calculation. The flat-rate calculator 1 continually compares, either on the basis of weekly averages to be calculated for this purpose or using the monthly averages, whether the possible deviations are within a certain range. If the deviations become too large, for example through Participation and intensive use of online services, the flat rate calculator 1 issues an indication alarm signal. This indicates that in the current trend, calculated from the subscriber-specific data, for example the last three months, the new flat rate deviates from the previous one by more than 15 percent, for example. The indication alarm is used, for example, to schedule a consultation with the customer concerned.

The diagram shown in Fig. 6 shows the trend deviations in the following way: Despite only slight deviations (D) from the process mean (ideal value is flat-rate compensation), the trend evaluation (°) shows that the process with the selected flat-rate cannot be kept within the specified process range . The costs incurred can no longer be compensated for by flat-rate payments. In the opposite case, namely a low usage, the cumulative credit can no longer be balanced, which means that the process must be re-assessed. In Fig. 6, the arrow b shows the course of the usage flat rate, the arrow e the curve for the exact consumption values and the arrow f the curve of the difference to the flat rate compensation.

FIG. 7 shows a basic circuit diagram of a system which works according to the method according to the invention. The system according to FIG. 7 essentially consists of the flat rate calculator 1, a switching center 3, a terminal 7 with a display 9 and a counter 8 for the communication consumption, for example a Shannon counter. The switching center 3 is connected via lines 6 both to the terminal 7 and to the counter 8. It receives the incoming information via line 2. Via the connections, lines 4 or the like, the charge information reaches the connected one Flat rate calculator 1 and, via the connections, lines 5 or the like, the flat rate information from the flat rate calculator 1 to the switching center 3. In the switching center 3 responsible for the respective customer, the continuously measured fee information is fed to the flat rate computer 1, which uses this data for a specific individual date determines the new flat rate for the next customer-specific billing year. All billing-relevant data, such as actual, target or lump sum, are forwarded to the terminal device 7 and can be logged there automatically or by hand, depending on the feature. The display 9 shows the amount of information used in the unit Shannon hours SHh. A Shannon hour is the amount of information transmitted, taking into account the transmission capacity of the channel and the actual transmission speed on the channel. A communication counter 8 is connected to each terminal 7. This communication counter is generally a Shannon counter, which is installed at the customer as a sealed or tamper-proof device. The reading is carried out either automatically by means of telemetry or, upon request, with a double card from the customer, who sends the counting card with his entered, read information back to his communication supplier. The flat rate calculator 1 processes the information about the amount of information used in three ways: it compares the current values with the defined process widths and generates the process alarm when the process alarm limit is exceeded; he checks the current consumption values for any trend formation and generates an indication alarm if the limit value is exceeded; it stores the charge information, the process behavior and the alarms for documentation purposes. Finally calculated the flat-rate calculator 1 at predetermined times or, if necessary, a new flat-rate value which better corresponds to the changed communication behavior of a respective customer.

8 shows a basic circuit diagram of a flat rate computer 1 with its external connections. In this example, an operator terminal 10 is used to control the flat rate calculator 1, which is connected to the flat rate calculator 1 via lines 19 and 24 to 26. In addition, the operator terminal 10 is connected to a log printer 11 via a line 17. On line 19 the information for setting parameters is sent to the flat rate calculator 1, on line 26 the signals for the process alarm go from the flat rate calculator 1 to the operator terminal 10, on line 25 the signals for the indicator alarm from the flat rate calculator 1 to the operator terminal 10 and on Line 24 also receives the flat-rate price display information from the flat-rate calculator to operator terminal 10. The flat-rate information also passes from flat rate computer 1 via the connection, line 5 or the like to the associated switching center, as shown in FIG. 7. Via a connection, line 4 or the like, the flat-rate computer 1 receives the charge information from the said exchange, which is given directly to the system memory 14 via a line 18 and to a circuit 12 for comparing the process width. The circuit 12 outputs its output signals to a circuit 13 for testing the trend formation via a line 20, the output of which is connected to the system memory 14 via a line 21 and which also outputs an indicator alarm to the operator terminal 10 via the line 25 at the given time. The circuit 12 gives on line 26, if necessary Signal for the process alarm to the operator terminal 10. The system memory 14 is connected via a line 22 to a comparison circuit which carries out the comparison actual to flat minus target. The output of the circuit 15 is connected via a line 23 to a circuit 16 for calculating the new flat rate, which is given to the outside via line 5 and to the operator terminal 10 via line 24.

All the consumption data supplied to the flat-rate calculator 1 and all the data supplied by this computer to the customer terminal (terminal 7 in FIG. 7) can be called up by the operator terminal 10 and displayed. The connected printer 11 can print out the data in a protocol. This system control can be carried out both operator-controlled and automatically, that is to say system-controlled. It should also be mentioned that the circuits 12 to 16 of the scaling computer 1 can also be implemented as system software in a one-processor or multiprocessor system.

In the following, examples of the calculation of the flat rate for new customers with parameter variations are given, as they can be implemented in software or hardware in the flat rate calculator 1.

The new customer flat rate is estimated using various parameters. For example, these parameters can be:

a) Customer self-assessment

b) Assessment by Telekom based on statistical data from anonymized customer profiles

Millieu affiliation Family relationships

job

Hobby / leisure activities

c) Assessment by Telekom based on the services ordered

POTS ISDN

Transmission channels

Connection type

Number of numbers Data services Online services Leased lines Mobile communication Broadband connections

d) Assessment by Telekom based on the connected communication devices

analog phones digital phones

Fax machine

Private branch exchange

Data terminals

computer

Telematics devices

Answering machine

The new customer flat rate results from these and possibly other estimation parameters:

Po = Gl * VSEK + G2 * VTstat + G3 * VTDLstg + G4 * VTKGer

with Gn (n = 1 ... 4) = weighting factors for the estimated values VSEK = consumption according to customer assessment VTstat = consumption according to Telekom

(Criterion b)) VTDIstg = consumption according to Telekom's assessment

(Criterion c)) VTKGer = consumption according to Telekom's assessment

(Criterion d))

Weighting factors

Gl = 0.1 (assessment of self-assessment)

G2 = 0.3 (assessment of the affiliation to the environment

Customer professionals) G3 = 0.3 (evaluation of expected uses based on

Commissioning) G4 = 0.3 (evaluation of expected uses based on the connected communication devices)

Examples of further flat-rate pricing:

Current flat rate for the year J0:

PJ0 = PJ-1 + PJ-2 + PJO + PTVÄnd

3

with PTVÄnd = generalized proportion of changes, if this is to be taken into account

The flat rate recalculation should be carried out if the "debt" or "credit limit" PAGrO or PAGrU are exceeded in two successive evaluation periods (months):

PJONeu: (PAGrO (tn) + PAGrO (tn-1)) - 2PJ0 = <0 (debt) or

PJONeu: (PAGrU (tn) + PAGrU (tn-l)) - 2PJO => 0 (credit) with PAGrO = upper alarm limit (debt limit amount) and PAGrU = lower alarm limit (credit limit amount) tn current evaluation period tn-1 past evaluation period

List of reference numbers

1 flat rate calculator

2 line

3 exchange

4.5 connection, line or the like

6 line

7 terminal

8 counters

9 display

10 operator terminal

11 log printers

12 comparison circuit

13 test circuit

14 system memory

15 comparison circuit

16 arithmetic circuit

17 to 26 line

VKT administration-optimized communication tariffing

Claims

PATENT CLAIMS

1.Procedures for administration-optimized communication tariffing in digitized or analog communication networks, wired, radio-based or laser-based, implemented terrestrially or via satellite, with terminals of a calling and a called subscriber, which are physically connected to one another via switching centers of the communication networks or their transmission channel is virtual is realized on a packet or cell basis, characterized in that

that the communication behavior is measured or ascertained for individual customers or customer groups on all connections of the communication network,

that individually user-related average connection times per unit of time are derived from this,

monthly average values are calculated from the measured daily values in a flat-rate calculator (1) and the idealized average value is determined from this as a flat-rate value for a certain larger period,

that a percentage surcharge to be derived from the respective individual communication profile for these process limit values is established as process limit values (PAGrO or PAGrU),

that a system alarm is triggered if these limit values are exceeded, indicating that the lump sum amount no longer matches the Annual consumption or another reference period to be defined must be brought into line,

that the process limit values (PGrO or PGrU) indicate the bandwidth that is covered by the flat rate algorithm in the flat rate calculator (1),

that the flat rate calculator (1) continuously compares on the basis of the mean values used whether the existing deviations are within the specified range or not and

that the flat-rate calculator (1) triggers an indicator alarm which indicates that, in the current trend, the resulting new flat-rate price deviates from the previous one by more than a fixed percentage.

2. The method according to the preamble of claim 1, characterized in that

that the continuously measured charge information via connections, lines (4) or the like is fed to a flat rate calculator (1),

that the computer uses this data to determine a new flat rate for the next customer-specific billing year at a specific individual date,

that all billing-relevant data are displayed on the customer's terminal (7),

that a communication counter (8) is assigned to each terminal (7), that the flat-rate calculator (1) processes the information about amounts of information used in such a way

that it compares the current values with the defined process widths and generates a process alarm if the specified process alarm limits are exceeded,

that he monitors or checks the current consumption values for any trend formation and generates an indicator alarm when the limit value is exceeded

that it stores the charge information in a system memory (14) and the process behavior and the generated alarms and

that the flat rate calculator (1) calculates a new flat rate value that corresponds to the changed communication behavior of the respective customer at a predetermined point in time or if necessary.

3. The method according to any one of claims 1 or 2, characterized in

that the process alarms are triggered when the process limit values (PGrO; PGrU) are exceeded and

that the process limit values are designed flexibly by setting parameters.

4. The method according to any one of claims 1 or 2, characterized in that the individual usage data for a customer or for customer groups are stored in the system memory (14) of the flat rate computer (1),

that they serve as the basis for regular fine-tuning and for setting the long-term flat-rate remuneration mean values,

that the lump-sum averages are automatically billed to users of communication services in specified periods, and

that the difference amounts resulting from a fine adjustment are automatically offset directly on the customer accounts.

5. The method according to any one of claims 1 or 2, characterized in

that new customers with their customer data are assigned to a certain user class and a fine adjustment is carried out for verification of the initial flat rate for a certain settling period and

that a remaining difference within a specified target sector of the exact value of the usage fee determines the flat rate in the long term using the flat rate calculator (1).

6. System or circuit arrangement for performing the method according to one of the claims 1 to 5, characterized in that that a switching center (3) with terminals (7) of a communication network and via connections, lines (4 and 5) or the like is connected to a flat rate computer (l) and

that each terminal (7) via lines (6) is equipped with a communication counter (8), the reading of which is done either automatically with telemetry means or when requested by the customer with a double card.

7. Circuit arrangement according to claim 6, characterized in

that the communication counter (8) is designed as a sealed or otherwise protected against manipulation Shannon counter,

that each terminal (7) has a display (9) for displaying the actual, target and lump sums or the consumption information.

8. Circuit arrangement according to one of the claims 6 or 7, characterized in that

that the flat-rate calculator (1) receives charge information via connections, lines (4) or the like, which is fed via internal lines (18) to the system memory (14) and a comparison circuit (12) for comparing the process width,

that the output of the comparison circuit (12) is connected via a line (20) to a circuit (13) for testing the trend formation, that its output is connected to the system memory (14) via a line (21),

that the system memory (14) is connected via lines (22) to a comparison circuit (15) for comparing the actual amount to the lump sum amount minus the target amount,

that the output of this comparison circuit (15) is connected via lines (23) to a computing circuit (16) for calculating the new flat rate and

that the output of this circuit is connected via lines (5) to the associated switching center (3) and via lines (24) to an operator terminal (10), which in turn is also connected to the comparison circuit (12) and the test circuit (13) via lines ( 26 or 25) for the process alarm or the indicator alarm and is connected via a further line (19) to the flat-rate calculator (1) for parameter setting.

9. Circuit arrangement according to claim 7, characterized in

that the operator terminal (10) is connected to a log printer (11).

10. Circuit arrangement according to one of the claims 6 to 8, characterized in that

that the system control is user-controlled or system-controlled.